Plate-hook.



B.F.UPHAM.

PLATE HOOK.

APPLICATION FILED APR. I5, |914. 193.43268. Patented June 8, 1915.

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BURT F. UPHAM, OF BOSTON, MASSACHUSETTS, ASSIG'NORVTO UNITED :PRINTINGMACHINERY CO., 0F BOSTON, MASSACHUSETTS, A CORPORATION 0F MASSACHU-SETTS.

PLATE-HOOK.

T0 all whom it may concern:

Be it known that I, BURT F. UPHAM, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Plate-Hooks; and Ihereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,which form part of this specification.

Thisinvention Vis a novel plate-hook or clamp particularly designed foruse in securing printingplates to the plate cylinders or beds ofprinting presses; and its object is to provide a strong, simple, andeasily applied hool. f

"The novel hook embodies a body portion that can be readily engaged withthe retaining grooves in the cylinder or bed to which the plate is to beattached; and which is provided with means for securely clamping itwithin such groove after its insertion therein; and to this body isconnected plateengaging portions or vclamp-members, so arranged' thatwhen the body-portion is inserted into the groove and then turned tosecure it therein the clamp-members will lie in plate engaging position,and after the plate is properly positioned the hook may be clamped inplace by means of a clamping screw within the body; and if it should bedesired to shift the` plate or hook slightly it can easily be done bydriving the hooks along the grooves.

The invention will be clearly understood from the following descriptionand the accompanying drawings; vand the essential features for whichprotection is desired are set forth in the claims.

Tn said drawings Figure 1 is a plan view of a part of the groovedsurface of a bed or cylinder to which printing-plates are to beattached, and showing my novel hooks securing such plates thereto. Fig.2 is an enlarged perspective view of a plate hook detached. Fig. 3 is anenlarged vertical section on the line 3 8, Fig. 1. Fig. 4 is a sectionon the line 4-4, Fig. 1.

The hook comprises a body portion 1 which is of a. width slightly lessthan the width of the mouth s of the inverted T- slots S in the bed orcylinder to which the printing plates are to be attached; the body islonger than it is wide so that when it is Specification of LettersPatent.

inserted into the slot and then turned at right angles thereto it willbe held therein, by reason of the engagement of the ends of the body-under the overhanging edges of the top ianges of the slot at each sideof the mouth thereof. ASaid slots s are practically T-shaped andhave'their mouths narrowerV than the width of the major portion of theslots, as shown. This body 1 is provided with a cylindric projection orcollar 2 on its upper end, formed integral with the body, and above thiscollar and projecting in 0pposite directions vtherefrom are clamps 3,which are lpreferably beveled on their side edges to engage the edges ofthe plates. Said clamps project from the collar 2 at such an angle tothe longest axis of the body 1 that when the body is inserted in a slotand turned at right angles thereto, said clamps will lie at an angle ofabout 45O to the slot, or parallel with the aXis of the cylinder, sothat they will properly engage the edges of the printing plates P uponthe cylinder or bed, as indicated in Fig. 1. The

said parts of the hook are all preferably f ormed integral, and theclamps may practically be one, but are slightly separated at their innerends for a purpose hereinafter explained.

The body has an internally threaded recess or socket in its under side,in which is placed a clamp bolt 4, which is adapted to be engaged by asuitable tool inserted through an opening 5 in the upper end of theblock and between the clamps 3, as indicated in Fig. 3; and this bolt 4can be retracted into the socket when it is desired to remove or insertthe body in a groove; and after the body is inserted in a groove and thehook properly positioned, the bolt 4 can be projected so as to clamp thebody firmly between the top and bottom walls of the slot as indicated inFig. 3.

A hook may be shifted slightly along the slot-without loosening the bolt4-by means of a tool as T (Fig. 4) having a reduced end t which can beengaged with the-opening 5 of the hook, and when so engaged by strikingthe outer end of the tool T with a hammer the hook can be forced alongthe slot. These hooks can be easily inserted in position and readilyadjusted along the slots and the plates adjusted to the desiredposition, and then locked as described; and if it is necessary to shiftthe plate slightly in j Patented June 8, 1915.

Application led April 15, 1914. Serial N o. 832,028.

sol

order to obtain register this can be done by driving the hooks along theslots by means of the tool T, in the desired direction.

What I claim is:

l. A plate hook comprising a body portion adapted to be inserted into aslot, and a clamp member above the slot, said hook having a recessadapted to be engaged by the bent end of a separable driving toolwhereby when so engaged the hook can be forced along the slot bystriking the tool with a hammer.

2. A plate hook having a bodyv portion adapted to be inserted in a slotthrough the contracted mouth thereof and turned at an angle thereto andprovided with a clamp member on its outer end above the slot, and

vhaving a recess extending through the clamp .slot throughthe-contracted mouth thereof and'then turned at an angle thereto toretain it in the slot, a clamp member on the upat an angle to the lengthof the body portion,

said hook having a vertical opening extend- (Jopies of this patent maybe obtained for ve cents each, by addressing the Commissionerofrlatents.k

ing through said clamp member and body for engagement with a hookadjusting tool, y

the lower portion of said opening within the body being threaded; and abolt in the threaded portion of said opening adapted to end of the bodyadapted toflie within the mouth of the slot, a clamp member on the outerend of the collar above the slot and integral therewith, said clampymember ly? ing at an angle to the length of the body portion; said hookhaving an opening eX- tending through said clamp member, collar andbody, for engagement with a hook adjusting tool, the lowerpart of theopening within the body being threaded; and a bolt in the threadedportion of said opening adapted to be projected to engage the bottom ofthe slot and lock the hoolrtherein, substantially as described. V

In testimony that I claim the foregoing as my own, I aiiX my signaturein presence of two witnesses.

BURTF. UPHAM. Witnesses: i Y

HERMANN A. DoLBEAs, JOHN COLDER.

Washington, D. C.

